1) The diagram below shows a block accelerating down a smooth slope.

It is known that there are two forces acting on the block, namely the weight of the block, W, and the normal contact force, N.

Which vector diagram correctly represents the forces acting on the block, where R is the resultant force?

2) A block of wood is at rest on a sloping ramp. The forces acting on the block are weight W of the block, the friction F between the block and the ramp, and the normal contact force N exerted by the ramp.

Which free-body diagram is correct?

3) Along a straight road, a 50.0 kg driver decelerated his car from 100 km h^-1 to rest in just 1.40 s.

What is the magnitude of the force acting on the driver?

4) Two blocks of masses 4.0 kg and 6.0 kg are joined by a light, inextensible string. The blocks are made to move with uniform acceleration of 2.0 m s^–2 under the action of a force F.

What is the value of the tension in the string, T,  and the applied force, F?

5) 2017 S4 EOY P1 Q07

A 15 N force acts on a 2.0 kg mass and a 1.0 kg mass resting on a smooth surface as shown below.

Which of the following is correct?